We read 20 results from Quartz Hill Water Dist.’s 2024 water quality report. No results over a legal limit; 5 above a health goal or guideline.
Serves about 19,100 people · Water system ID CA1910130 · Read the district’s 2024 report (opens in a new tab)
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Results from the 2024 report
Each number is copied from the district’s report and links to the page it’s printed on. Where the report lists several plants, wells or purchased water, the highest is shown.
| Contaminant | Result | Health goal | Legal limit | What it means |
|---|---|---|---|---|
| Gross alpha (radioactivity)average · range 6.4 to 6.4 · 2024 report, page 8 | 6.4 pCi/L | 0 pCi/L | 15 pCi/L | Above the health goalThe health goal is zero |
| Perchlorateaverage · range 1.2 to 1.5 · 2024 report, page 8 | 1.3 ppb | 1 ppb | 6 ppb | Above the health goal1.3x the health goal |
| Radium-226average · range 0.31 to 0.98 · 2024 report, page 8 | 0.55 pCi/L | 0.05 pCi/L | 5 pCi/L | Above the health goal11x the health goal |
| Radium-228average · range 0.52 to 2.04 · 2024 report, page 8 | 1.18 pCi/L | 0.02 pCi/L | 5 pCi/L | Above the health goal62x the health goal |
| Uraniumaverage · range 9.83 to 9.83 · printed as 6.6 pCi/L · 2024 report, page 8 | 9.83 ppb | 0.6 ppb | 30 ppb | Above the health goal16x the health goal |
| Chlorideaverage · range 37 to 45 · 2024 report, page 9 | 41 ppm | — | 250 ppm guideline | Within the guideline |
| Chlorineaverage · range 0.3 to 1.5 · 2024 report, page 8 | 0.76 ppm | None set | 4 ppm | Below the legal limit |
| Copper90th percentile of 30 homes tested, 0 over the action level · sampled 2022 · Customer taps · 2024 report, page 9 | 0.25 ppm | 0.3 ppm | 1.3 ppm (action level) | Below the health goal |
| Disinfection byproducts (HAA5)average · range 9.5 to 27.3 · 2024 report, page 8 | 17.3 ppb | None set | 60 ppb | Below the legal limit |
| Disinfection byproducts (TTHM)average · range 29.2 to 79.7 · 2024 report, page 8 | 59.1 ppb | None set | 80 ppb | Below the legal limit |
| Fluorideaverage · range 0.42 to 0.67 · 2024 report, page 8 | 0.54 ppm | 1 ppm | 2 ppm | Below the health goal |
| Lead90th percentile of 30 homes tested, 0 over the action level · sampled 2022 · Customer taps · 2024 report, page 9 | Not detected | 0.2 ppb | 15 ppb (action level) | Not detected |
| Nitrate (as N)average · range 0.79 to 8.4 · 2024 report, page 8 | 4.5 ppm | 10 ppm | 10 ppm | Below the health goal |
| Sulfateaverage · range 52 to 71 · 2024 report, page 9 | 60.5 ppm | — | 250 ppm guideline | Within the guideline |
| Total dissolved solidsaverage · range 330 to 380 · 2024 report, page 9 | 356 ppm | — | 500 ppm guideline | Within the guideline |
| Alkalinityaverage · 2024 report, page 9 | 130 ppm | None set | None | No health limit |
| Conductivityaverage · range 530 to 570 · 2024 report, page 9 | 558 µS/cm | None set | None | No health limit |
| Hardnessaverage · range 6.43 to 8.19 · 2024 report, page 9 | 7.31 gpg (125 ppm) | — | — | Hard |
| Sodiumaverage · range 51 to 71 · 2024 report, page 9 | 59.5 ppm | None set | None | No health limit |
| Vanadiumaverage · range 15 to 20 · 2024 report, page 9 | 17.5 ppb | None set | None | No health limit |
Utility results describe the whole system, measured where water enters the pipes, not your tap. Your home’s plumbing can add lead or copper. 2 numbers we weren’t sure about are held back until a person checks.
EPA testing for PFAS and lithium
EPA’s own nationwide testing (UCMR 5) found these in Quartz Hill Water Dist.’s water between Mar 2025 and Dec 2025. These are EPA lab results, separate from the district’s report. Anything not listed was not detected.
- Lithium28.1 ppbFound in 6 of 10 samples · highest resultAbove EPA’s health reference level of 10 ppb (a guide, not a legal limit)
Source: EPA UCMR 5 occurrence data. The highest single result is shown; one high sample doesn’t mean every glass is that high.
What you can do
Nothing here is an emergency notice: if the district has a violation, it must tell customers directly. If you’d like to lower these at your tap, these are the treatments that remove them, and the catalog shows the models certified for each. Ranking is by certified removal; commissions never change the order.
Radium and uranium
Found: Gross alpha (radioactivity), Radium-226, Radium-228, Uranium
What removes it: Reverse osmosis.
Industrial chemicals and pesticides
Found: Perchlorate
What removes it: Carbon block or RO.
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